Western Digital shares surged 6.69% over the past 24 hours, propelled by a combination of upbeat company guidance and a broader rally across the memory chip sector.

The primary catalyst was the company's own outlook, as it guided for first-quarter profit and revenue to exceed market expectations, significantly boosting investor confidence ahead of its upcoming earnings report. The bullish sentiment was further reinforced by Wedbush, which raised its price target on Western Digital to $650 from $540 while maintaining an Outperform rating, signaling confidence in the stock's valuation.

The memory chip space as a whole received a major lift from Microsoft's earnings, which highlighted robust AI capital spending alongside a commitment to positive free cash flow, easing concerns about the sustainability of the AI investment cycle. Samsung's strong quarterly results and its forecast for continued memory shortages also fueled the rally, benefiting peers such as Western Digital, Micron, and Seagate.